براغي رأس أسطواني M16-2 X 70 مم | رأس مسطح محرك سداسي داخلي | خيط جزئي | فولاذ سبائكي فئة 10.9 مطلي بالزنك (25 قطعة/عبوة)

These hex socket heads seated perfectly flush in my jig plate, and the zinc plating looks like it will hold up well against shop grime. The partial threading gave just the right grip depth for my assembly without bottoming out.

I needed some heavy-duty fasteners for a custom machine jig, and the hex socket drive on these made installation surprisingly easy even in tight spots. The zinc plating gives them a clean, durable finish, and the 10.9 alloy steel feels rock solid when torqued down.

The partially threaded design on these M16 screws made aligning them in my tooling fixture much easier than fully threaded versions. Zinc plating looks clean and the hex socket drive fits my wrenches perfectly without any play.